The average salary for newly graduated accounting
people is P18,000. 00 per month. If the salaries are
assumed to be normally distributed and the standard
deviation is P2,000. 00, find the probability that a new
accounting graduate will have a salary of:
a. P21,000. 00 or over per month
b. P17,000. 00 or lower per month
c. P19,000. 00 to P24,000. 00​.